Electric regulation



J. CREVELING.

ELECTRIC REGULATION.

APPLICATION FILED NOV. 1, I916- RENEWED APR. I7, T922;

1,420,817. Patented June 27, 19-22.

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' regulate an electric function in a predeteru i-ran STA or warm rnamsgnaw roan; as'sronoarocourn courmaa I courmv, a coaroaa'rron or NEW YORK.

Specification of Letters Patent.

ENT oFmE,

. macrarc aacurariou Applicationfled number 1, 1916, Serial na iaasia Renewed 911117, 1922. Serial No, 558,920.

To allichomit may concern."

Be i known that I, JOHN a citizen of the United States, residing in White P1ains,-county of Westchester, and. Stateof New York, have invented certain new and useful Improvements in Electric Regulation, of which the following is a descri tion. V y .invention electric regulation wherein it is desiredto mined manner, and hasfor a. particular ob ject to provide means whereby said regu-.

lation will be automatically accomplished. This application isa contmuation, in so far as common subject-matter is disclosed, of

my application for pateiit for improvements in electric regulation, Serial. No.

- 74,070, filed January 25, 1916.

- In the drawing, FigrI ;is.a diagrammatic representation of one type of electrical system embodying my invention;'and

Fig. 11 illustratesa modification which may bemade in the general system' portrayed in Fig. 1 without departing from my invention. v In Fig. I, l represents a dynamo or generat'or, the positive terminal'of -which is connected as by-lead 2 with the positive terminals of the storage, battery 3 and lamps .or other translating devices indicated at 4.

V The negative terminals ofthe ti'anslating 7 .device'sand the storage battery are connected as by lead v5 with one side of any suit-.'

85 able switch 6,- the oppositei terminal of site end of'which is connected as by lead 9-- which is connected as by wire ,7 with one end of the winding or solenoid 8, the oppowith the negative terminalof the generator. The generator-is provided with any suitable excitingmeans, in this instanceindicated as the usual shunt coil 10, having in'series' therewith a regulating element lliindicated as afcarbon pile. It will therefore be obvious that the generator may be regulated V by proper manipulation of the pressure ap-" plied to the pile 11, which will control the resistance thereof. A pivot 12 carries a bell-crank lever comprising the short arm '13 and the long arm 14, while the pivot 152" carries a bell-crank lever having the short arm 16 and the long arm 17. The carbon pile 11 is held by any-of the well known supporting means, p'urposelyjomitted for the .sake of clearness, between the levers L. Cravnmnd,

pertains to that class of.

y 13 and 16, and therefore the pressure'upon Patented June 27,1922.

the pile 11, may be increased by swinging I the levers 14 and 17 in a downward direc-- tion so as to cause levers 13 and 16 to approach each other. The springs 18 and 19 tend to draw the levers 1'4 and Y17 downwardly and-increase the pressure upon the pile 11', while the limit of downward movement that may be given the said levers may be ad usted as by screws 20 and 21. If de' sired, the springs 18 and 19 may be suppressed 'andweights, as indicated at- 22, used lll'thell stead, or such weights may be used in conjunction therewith. 23 is a I spring y eldlnglyconnecting the levers 13 and -16 and tending to draw the same toget-her. The tension of the spring 23 may be adjusted as by nuts 24: The outerexvided with sheaves or rollers 25 and 26 'tremities of the levers 14 and 17 are pro- 1 spective sheave to be raised in such man with and relieve the pressure upon'the carbon pile and increase the,resistance thereof.

"The cores 27 and 28 may beheld in their "positions of proper-alignment by any suitable means, and are preferably provided with dashpotsj29 which restrain too sud-' den movement of the said cores. The core 28 is surrounded by the coil 8 in such man-.

her as to lift the lever cooperating therene'ri't'hat energization of the, said coil tends,

to liftfthe core. The core .27 is'surroundedby the coil 30 which is'shown in shuntj Y 1 across the'generator and which when energized 'tends to lift the. core 27. fThe'op-.

'eratidn ofthe coil 8 may be adjusted-as by" "means of the variable shunt .31, while the operation of the coil 30 may be adjusted as Fig. II like numerals are used to indi- .by means of the variable resistance 32.

cate like parts, and the only modification intended 'to be brought out by the use of this figure-is the coil 33 which may be used r in place of coil 8 of Fig. I, in which event the coil affecting the core 28 will be responsive to'currentinthe bat terycircuit only,

while the coil 80f Fig. I is responsive tothe total generator output. 7

p The mam switch (I), the mere presence of which is diagrammatically indicated, is preferably one of the automatic variety, closing its circuit when the generator voltage is sub stantially equal to that of the storage battery, and opening the circuit when the generator voltage falls very slightly below that of the battery so as to prevent back discharge from the battery through the generator. As such switches are well known in the art, details are purposely Omitted for the sake of brevity.

An operation of my invention is substantially as follows, referring particularly to Fig. I 2

If low spe its voltage will be below that of the storage battery 3 and switch 6 will be open and the translating devices 4 may be supplied by the battery 3 in a well known manner. f the enerator have its "speed brought up until ts voltage is slightly in excess of that of the battery, switch 6 will close and current will then flow from the generator to the battery and translating devices, returning to the generator through coil 8, and thereby causing the same to tend to raise the core 28. And I so adjust the tension of spring 19, spring 23 and adjustable shunt 31, or whatever instrumentaliti es may-be employed for the purpose 15f adjustment, that when the t'urrent supplied by the generator, which of course will tend to increase with an increase in speed, reaches a predetermined maximum, as for example the maximum current desired to have delivered by the generator, this output will, by raising the core 28 and bringing the same into contact with sheave 26, and then by swinging the lever 17 in .an upward direction, swing the lever 16 in a direction away from the pile 11 so as to decrease the pressure thereupon and cut down the generator fieldand prevent this maximum desired current from being exceeded. Throughout this operation lever 14 will rest upon its stop 20, and lever 13 will form an abutment for the opposite end of the pile 11. If, for any reason, delivery of this maximum current controlled. by the coil 8 necessitate the maximum desired voltage upon any part ,of the system, across which may be connected the coil 30, (which in this instance is shown across the generator circuit and therefore practically determiningits terminal voltage), I so adjust resistance 32, spring 18 and weight 22, or whichever of such devices may be used,-

the enerator -1 be at rest or running at to settle down upon its stop 21 and core 28 will tend to assume the position shown in the drawing and lever 16 will'serve merely as a stop or abutment against. one end of the pile 11, while the entire regulation will be performed by the voltage responsive means so long as the current remains below that limited by the solenoid 8 and its cooperating parts. If the rise in voltage across the system be due to the rise in voltage across the battery terminals, owing to the battery having been fully charged, it is desirable when this point is reached that the battery charging current be quite substantially reduced or terminated, more or less abruptly, so as to save a long tapering charging current which increased pull of the spring 23, which is relieved as soon as core 28 and lever 17 descend. And, therefore, the voltage responsive means operates against a slightly lower opposition than when it started to usurp the function of regulation, and now holds a slightly lower voltage upon the system than that necessary to bring it into action. And this slight difference in voltage will cause the charging current to fall off quite rapidly and approach zero, as may readily be determined by adjusting the parts in a manner which will be plain to one skilled in the art. Y

It will be noted that by having the cores normally detached and out of contact with their respective arms 'orlevers, a consider able fluctuation in the magneto-motive'force of either coilmay take place without in any way affecting the regulating apparatus so long as the magneto-motive force is insuificient to raise its core;' and after the core is brought into contact with its respective lever, adjustment of the spring or weight or both, or whatever means may be employed, may then determine to a nicety the exact magnetomotive force necessary to operate the regulator.

- The operation of that modification intended to be brought out by use of Fig. II is substantially the same as the operation above with respect to Fig. I, with the excep-' Fig. I, and, therefore, the battery charging current will be limited, instead of the total generator output; and in such an arrangement it is obvious that the battery charging current may be made to fall off even more rapidly when the voltage responsive means usurps the function of regulation than in the system of Fig. I when the translating devices are in circuit.

From the foregoing it will be noted that my invention produces a system wherein the current delivered by the generator to a particular circuit, as for example the main circuit or the battery circuit, may be held from exceeding a predetermined desirable limit, and wherein the voltage across a circuit, as for example across the generator terminals or the battery terminals, may be held from exceeding a predetermined limit, and that whenever the voltage responsive means usurps the function of the current responsive means, causing the same to go out of action, the voltage responsivemeans will, due to an effect of its own operation, react upon the system in such manner that the charging current will, in an adjustable degree. be abruptly decreased or terminated.

I do not wish in any way to limit myself to any of the exact constructions or details of operation given above to illustrate one embodiment ofmy invention, for it will be obvious that wide departure may be made without departing from'the spirit and scope thereof which is set forth in the following claims.

What I' claim is:

'1. The combination with regulating means, a plurality of means for affecting the same,'and uniting means causing cooperation therebetween, of voltage and current responsive means capable of movement; without affecting sald affecting means and ca-' pable of affecting the sameunder predetermined conditions. l L

2. Means forv regulating an electric circuit comprehending circuit affecting means, a plurality of means for affecting the same, movable means capable of movement withdut affecting said means, current and voltage responsive means for moving said movable means into operative relation with the affecting means to regulate said circuit, and means whereby the movable means-acooperate.

3. Means for regulating an electric circuit comprehending circuit affecting means, a plurality of means for affecting the same, movable means capable of movement without affecting said means, current and voltage responsive means for moving said movable means into operative relation with the affecting means to regulate said circuit, and adplurality of means for affecting the same,

movable means capable of movement without affecting said means, current and voltage responsive means for moving said movable means into operative relation with the affecting means to regulate said circuit, means whereby the affecting means cooperate in regulating said circuit, and means for independently and mutually adjusting the relationship between said operating means.

6. Means for regulating an electric circuit comprehending circuitafl'ecting means, a plurality of means for affecting the same, movable means capable of movement without affecting said means, current and voltage responsive means for moving said movable means into operative relation with the affecting means to regulate said circuit, means whereby the affecting means cooperate in .regulating said circuit, and means for independently and mutually adjusting the relationship between the operation of the responsive means.

7. The combination with regulating means, a plurality of separately movable means capable of separately affecting the same and uniting means causing cooperation between said affecting means, of a plurality of responsive means each capable of movement without affecting said affecting means and affecting the same under predetermined conditions of operation.

8. The combination with regulating means, a plurality of separately movable means each separately affecting the same and uniting means causing cooperation between the affecting means, of a. plurality ofresponsive means each capable of movement without affecting said affecting means and each capable of engaging one of the affecting means and operating the same under predetermined conditions.

' JOHN L. CREVELING. 

